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Pharmacological Mechanisms for Targeting the Hippo Pathway
Pharmacological Mechanisms for Targeting the Hippo Pathway
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260311091518.5
- ISBN
- 9798283479347
- DDC
- 572.6
- 저자명
- Bulos, Maya L.
- 서명/저자
- Pharmacological Mechanisms for Targeting the Hippo Pathway / Maya L Bulos
- 발행사항
- [Sl] : The Scripps Research Institute, 2025
- 형태사항
- 1 electronic resource (169 pages)
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
- 주기사항
- Advisors: Bollong, Michael J. Committee members: Erb, Michael A.; Cravatt, Benjamin F.; Lamia, Katja A.; Rape, Michael.
- 학위논문주기
- - Ph.D. : The Scripps Research Institute, 2025.
- 초록/해제
- 요약A key question in developmental biology is how cellular proliferation and organ size are regulated throughout life. Genetic screens for tumor suppressor genes in Drosophila identified the Hippo signaling pathway as a master regulator of cell proliferation and tissue growth. The pathway can be activated by cell-cell contacts, metabolic changes, and diverse extrinsic inputs to restrict the activity of the downstream effector Yes-associated protein 1 (YAP), which therefore prevents overgrowth and abnormal cell proliferation. Despite these foundational findings from over 20 years ago, there is not a complete mechanistic understanding of pathway regulation, and recent work suggests multiple additional signaling nodes regulate the Hippo pathway. These signaling nodes not only reveal fundamental aspects of cell biology but also act as novel druggable targets to control Hippo pathway activity. The Hippo pathway is a desirable drug target, as YAP can mobilize and proliferate endogenous progenitor cells to heal injuries. Indeed, studies on YAP activation through genetic methods indicate this strategy can promote regeneration of organs such as skin, intestine, liver, and heart. Studies like these have suggested that small molecule activators of YAP may have potential therapeutic utility in diseases involving insufficient tissue repair. However, attempts at activating YAP pharmacologically have focused on targeting the core kinases of the pathway, which can lead to undesirable on-target effects due to their activity in cell cycle control and transcription. Therefore, we hypothesize that chemically targeting regulators of the Hippo pathway that specifically relay YAP-inhibitory signals will provide control of YAP activation without affecting other essential biological processes. Here, we show that unbiased high-throughput screening of new and repurposed compounds can identify small molecule activators of YAP. These compounds target proteins involved in Hippo pathway responses to cell polarity and density, which emphasizes the importance of these signals in regulating cellular proliferation.We first explored if known drugs might activate YAP by conducting a reporter-based screen of the Repurposing, Focused Rescue, and Accelerated Medchem (ReFRAME) small molecule library (Chapter 2). Of the 15 identified kinase inhibitors that activate YAP, we focused on SM04690, a compound found to inhibit canonical Wnt signaling. We found that by inhibiting CLK2, SM04690 induces alternative splicing of exons 5 and 9 of AMOTL2, a protein integral to Hippo pathway activity. Alternatively spliced AMOTL2 can no longer localize YAP to the membrane, so YAP is free to enter the nucleus and turn on its transcriptional program. Since SM04690 broadly modulates alternative splicing, it is not desirable as a regenerative therapeutic. However, it is a useful pharmacological tool to better understand and control Hippo pathway activity.We next sought to identify new chemical matter that can activate YAP. A compound with a quinazoline scaffold was selected for a structure activity relationship by supplier inventory study to yield the small molecule hit, sCMF231 (Chapter 3). After confirmation of sCMF231 as a YAP activator, we generated a photo-activatable probe to study its cellular target. We found that our compound targets FUBI, a ubiquitin-like protein with no established connection to the Hippo pathway. Proteomics studies to find covalent targets of FUBI identified ANXA2, a protein our lab previously identified as a central regulator of the Hippo pathway. We found that sCMF231 treatment induces the delocalization of ANXA2 from the plasma membrane, which is necessary for its control of YAP activity. We additionally performed proteomics experiments to identify machinery required for FUBI conjugation to target proteins. In situ co-immunoprecipitation and in vitro fubylation assays revealed UBA1, UBE2C, and APC/C are components of FUBI's conjugation machinery to ANXA2. This work reveals fubylation as a novel Hippo pathway-specific regulation system akin to ubiquitination.
- 언어주기
- English
- 일반주제명
- Cellular biology
- 일반주제명
- Biochemistry
- 일반주제명
- Pharmacology
- 키워드
- Hippo pathway
- 기타저자
- The Scripps Research Institute Chemical Biology
- 기본자료저록
- Dissertations Abstracts International. 86-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■1001 ▼aBulos, Maya L.▼eauthor.
■24510▼aPharmacological Mechanisms for Targeting the Hippo Pathway ▼cMaya L Bulos
■260 ▼a[Sl]▼bThe Scripps Research Institute▼c2025
■264 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a1 electronic resource (169 pages)
■336 ▼atext▼btxt▼2rdacontent
■337 ▼acomputer▼bc▼2rdamedia
■338 ▼aonline resource▼bcr▼2rdacarrier
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-12, Section: B.
■500 ▼aAdvisors: Bollong, Michael J. Committee members: Erb, Michael A.; Cravatt, Benjamin F.; Lamia, Katja A.; Rape, Michael.
■5021 ▼bPh.D.▼cThe Scripps Research Institute▼d2025.
■520 ▼aA key question in developmental biology is how cellular proliferation and organ size are regulated throughout life. Genetic screens for tumor suppressor genes in Drosophila identified the Hippo signaling pathway as a master regulator of cell proliferation and tissue growth. The pathway can be activated by cell-cell contacts, metabolic changes, and diverse extrinsic inputs to restrict the activity of the downstream effector Yes-associated protein 1 (YAP), which therefore prevents overgrowth and abnormal cell proliferation. Despite these foundational findings from over 20 years ago, there is not a complete mechanistic understanding of pathway regulation, and recent work suggests multiple additional signaling nodes regulate the Hippo pathway. These signaling nodes not only reveal fundamental aspects of cell biology but also act as novel druggable targets to control Hippo pathway activity. The Hippo pathway is a desirable drug target, as YAP can mobilize and proliferate endogenous progenitor cells to heal injuries. Indeed, studies on YAP activation through genetic methods indicate this strategy can promote regeneration of organs such as skin, intestine, liver, and heart. Studies like these have suggested that small molecule activators of YAP may have potential therapeutic utility in diseases involving insufficient tissue repair. However, attempts at activating YAP pharmacologically have focused on targeting the core kinases of the pathway, which can lead to undesirable on-target effects due to their activity in cell cycle control and transcription. Therefore, we hypothesize that chemically targeting regulators of the Hippo pathway that specifically relay YAP-inhibitory signals will provide control of YAP activation without affecting other essential biological processes. Here, we show that unbiased high-throughput screening of new and repurposed compounds can identify small molecule activators of YAP. These compounds target proteins involved in Hippo pathway responses to cell polarity and density, which emphasizes the importance of these signals in regulating cellular proliferation.We first explored if known drugs might activate YAP by conducting a reporter-based screen of the Repurposing, Focused Rescue, and Accelerated Medchem (ReFRAME) small molecule library (Chapter 2). Of the 15 identified kinase inhibitors that activate YAP, we focused on SM04690, a compound found to inhibit canonical Wnt signaling. We found that by inhibiting CLK2, SM04690 induces alternative splicing of exons 5 and 9 of AMOTL2, a protein integral to Hippo pathway activity. Alternatively spliced AMOTL2 can no longer localize YAP to the membrane, so YAP is free to enter the nucleus and turn on its transcriptional program. Since SM04690 broadly modulates alternative splicing, it is not desirable as a regenerative therapeutic. However, it is a useful pharmacological tool to better understand and control Hippo pathway activity.We next sought to identify new chemical matter that can activate YAP. A compound with a quinazoline scaffold was selected for a structure activity relationship by supplier inventory study to yield the small molecule hit, sCMF231 (Chapter 3). After confirmation of sCMF231 as a YAP activator, we generated a photo-activatable probe to study its cellular target. We found that our compound targets FUBI, a ubiquitin-like protein with no established connection to the Hippo pathway. Proteomics studies to find covalent targets of FUBI identified ANXA2, a protein our lab previously identified as a central regulator of the Hippo pathway. We found that sCMF231 treatment induces the delocalization of ANXA2 from the plasma membrane, which is necessary for its control of YAP activity. We additionally performed proteomics experiments to identify machinery required for FUBI conjugation to target proteins. In situ co-immunoprecipitation and in vitro fubylation assays revealed UBA1, UBE2C, and APC/C are components of FUBI's conjugation machinery to ANXA2. This work reveals fubylation as a novel Hippo pathway-specific regulation system akin to ubiquitination.
■546 ▼aEnglish
■590 ▼aSchool code: 1179
■650 4▼aCellular biology
■650 4▼aBiochemistry
■650 4▼aPharmacology
■653 ▼aAlternative splicing
■653 ▼aChemical genetics
■653 ▼aHippo pathway
■653 ▼aRegenerative medicine
■653 ▼aUbiquitin-like modification
■7102 ▼aThe Scripps Research Institute▼bChemical Biology.▼edegree granting institution.
■7201 ▼aBollong, Michael J.▼edegree supervisor.
■7730 ▼tDissertations Abstracts International▼g86-12B.
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357942▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


